On the magnet, magnetick bodies also, and on the great magnet the earth: a new physiology, demonstrated by many arguments & experiments

"On the Magnet, Magnetick Bodies also, and on the Great Magnet the Earth" by William Gilbert is a scientific publication written in the early 17th century. This work focuses on the principles and properties of magnetism, exploring the nature of magnetic materials and their relationship to the Earth itself, often regarded as a magnet. It aims to establish a new understanding of magnetism through rigorous experimentation and observation, challenging previous notions held by ancient and contemporary philosophers. At the start of the text, Gilbert presents a preface that emphasizes the importance of empirical experimentation over theoretical speculation in understanding magnetism. He critiques earlier works and offers insights into various historical and mythical interpretations of magnetic phenomena. Gilbert explains the significance of the loadstone and outlines his observations and experiments that lead him to surmise that the Earth itself has magnetic properties. He highlights his intent to lay a solid foundation for magnetical philosophy, proposing that this work will reveal deeper truths about the natural world through careful scientific inquiry.